:root {
    --primary-color: #2563EB;
    --primary-dark: #1E40AF;
    --secondary-color: #22C55E;
    --secondary-dark: #16A34A;
    --danger-color: #EF4444;
    --text-color: #334155;
    --text-light: #64748B;
    --bg-light: #F8FAFC;
    --bg-white: #FFFFFF;
    --bg-dark: #0F172A;
    --border-color: #E2E8F0;
    --sidebar-width: 260px;
    --header-height: 70px;
    --bottom-nav-height: 60px;
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    --transition: all 0.3s ease;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Inter', sans-serif;
    color: var(--text-color);
    background-color: var(--bg-light);
    line-height: 1.6;
    height: 100vh;
    overflow: hidden;
}

a {
    text-decoration: none;
    color: inherit;
    transition: var(--transition);
}

ul {
    list-style: none;
}

img {
    max-width: 100%;
    display: block;
}

/* Utilities */
@media (min-width: 769px) {
    .d-md-none {
        display: none !important;
    }
}

@media (max-width: 768px) {
    .d-none-md {
        display: none !important;
    }
    
    .sidebar {
        position: fixed;
        top: 0;
        left: 0;
        height: 100vh;
        width: 280px;
        transform: translateX(-100%);
        transition: transform 0.3s ease;
        z-index: 1001;
        box-shadow: var(--shadow-lg);
    }

    .sidebar.show {
        transform: translateX(0);
    }

    .sidebar-overlay {
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        background-color: rgba(0,0,0,0.5);
        z-index: 1000;
        opacity: 0;
        visibility: hidden;
        transition: all 0.3s ease;
    }

    .sidebar-overlay.show {
        opacity: 1;
        visibility: visible;
    }
}

/* Layout */
.dashboard-container {
    display: flex;
    height: 100vh;
}

/* Sidebar */
.sidebar {
    width: var(--sidebar-width);
    background-color: var(--bg-white);
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    height: 100%;
    transition: var(--transition);
    z-index: 100;
}

.sidebar-header {
    height: var(--header-height);
    display: flex;
    align-items: center;
    padding: 0 1.5rem;
    border-bottom: 1px solid var(--border-color);
}

.logo-area {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--primary-color);
}

.sidebar-nav {
    flex: 1;
    padding: 1.5rem 1rem;
    overflow-y: auto;
}

.sidebar-nav ul {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.sidebar-nav a {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem 1rem;
    border-radius: 0.5rem;
    color: var(--text-light);
    font-weight: 500;
}

.sidebar-nav a:hover,
.sidebar-nav a.active {
    background-color: #EFF6FF;
    color: var(--primary-color);
}

.sidebar-footer {
    padding: 1rem;
    border-top: 1px solid var(--border-color);
}

.sidebar-footer a {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem 1rem;
    color: var(--danger-color);
    font-weight: 500;
    border-radius: 0.5rem;
}

.sidebar-footer a:hover {
    background-color: #FEF2F2;
}

/* Main Content */
.main-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    height: 100%;
    overflow: hidden;
    position: relative;
}

.top-header {
    height: var(--header-height);
    background-color: var(--bg-white);
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 2rem;
}

.header-left {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.header-left h2 {
    font-size: 1.25rem;
    font-weight: 600;
}

#mobile-menu-toggle {
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--text-color);
    cursor: pointer;
    padding: 0.25rem;
    display: flex;
    align-items: center;
    justify-content: center;
}

.user-profile {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.user-profile img {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    object-fit: cover;
}

.user-profile span {
    font-weight: 500;
    font-size: 0.875rem;
}

.content-body {
    flex: 1;
    padding: 2rem;
    overflow-y: auto;
}

/* Bottom Nav */
.bottom-nav {
    display: none;
    position: fixed;
    bottom: 0;
    left: 0;
    width: 100%;
    height: var(--bottom-nav-height);
    background-color: var(--bg-white);
    border-top: 1px solid var(--border-color);
    justify-content: space-around;
    align-items: center;
    z-index: 999;
}

.bottom-nav-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    font-size: 0.75rem;
    color: var(--text-light);
    gap: 0.25rem;
    flex: 1;
    height: 100%;
}

.bottom-nav-item i {
    font-size: 1.25rem;
}

.bottom-nav-item.active {
    color: var(--primary-color);
}

/* Modals */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
}

.modal-overlay.show {
    opacity: 1;
    visibility: visible;
}

.modal-content {
    background-color: var(--bg-white);
    width: 100%;
    max-width: 500px;
    border-radius: 0.75rem;
    box-shadow: var(--shadow-lg);
    transform: translateY(-20px);
    transition: var(--transition);
    overflow: hidden;
    margin: 1rem;
}

.modal-overlay.show .modal-content {
    transform: translateY(0);
}

.modal-header {
    padding: 1.25rem;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.modal-header h3 {
    font-size: 1.125rem;
    font-weight: 600;
}

.close-modal {
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--text-light);
    cursor: pointer;
}

.modal-body {
    padding: 1.5rem;
}

.modal-footer {
    padding: 1.25rem;
    border-top: 1px solid var(--border-color);
    display: flex;
    justify-content: flex-end;
    gap: 0.75rem;
}

/* Form Elements */
.form-group {
    margin-bottom: 1rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    font-size: 0.875rem;
}

.form-control {
    width: 100%;
    padding: 0.625rem;
    border: 1px solid var(--border-color);
    border-radius: 0.5rem;
    font-family: inherit;
    font-size: 0.875rem;
    transition: var(--transition);
}

.form-control:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.625rem 1.25rem;
    border-radius: 0.5rem;
    font-weight: 500;
    font-size: 0.875rem;
    cursor: pointer;
    border: none;
    gap: 0.5rem;
    transition: var(--transition);
}

.btn-primary {
    background-color: var(--primary-color);
    color: white;
}

.btn-primary:hover {
    background-color: var(--primary-dark);
}

.btn-secondary {
    background-color: var(--bg-light);
    color: var(--text-color);
    border: 1px solid var(--border-color);
}

.btn-secondary:hover {
    background-color: #F1F5F9;
}

.btn-danger {
    background-color: var(--danger-color);
    color: white;
}

.btn-danger:hover {
    background-color: #DC2626;
}

.btn-sm {
    padding: 0.375rem 0.75rem;
    font-size: 0.75rem;
}

/* Tables */
.table-container {
    background-color: var(--bg-white);
    border-radius: 0.75rem;
    box-shadow: var(--shadow-sm);
    overflow: hidden;
    border: 1px solid var(--border-color);
}

.table-responsive {
    overflow-x: auto;
}

table {
    width: 100%;
    border-collapse: collapse;
}

th, td {
    padding: 1rem;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

th {
    background-color: var(--bg-light);
    font-weight: 600;
    font-size: 0.75rem;
    text-transform: uppercase;
    color: var(--text-light);
}

tr:last-child td {
    border-bottom: none;
}

/* Badge */
.badge {
    padding: 0.25rem 0.5rem;
    border-radius: 9999px;
    font-size: 0.75rem;
    font-weight: 500;
}

.badge-success {
    background-color: #DCFCE7;
    color: #166534;
}

.badge-danger {
    background-color: #FEE2E2;
    color: #991B1B;
}

/* Login Page Styles */
.login-page {
    display: flex;
    align-items: center;
    justify-content: center;
    height: 100vh;
    background: var(--bg-light);
}

.login-card {
    background: var(--bg-white);
    padding: 2.5rem;
    border-radius: 1rem;
    box-shadow: var(--shadow-lg);
    width: 100%;
    max-width: 400px;
}

.login-header {
    text-align: center;
    margin-bottom: 2rem;
}

.login-logo {
    font-size: 3rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

/* Responsive */
@media (max-width: 768px) {
    .sidebar {
        position: fixed;
        top: 0;
        left: 0;
        height: 100vh;
        width: 280px;
        transform: translateX(-100%);
        transition: transform 0.3s ease;
        z-index: 1001;
        box-shadow: var(--shadow-lg);
    }

    .sidebar.show {
        transform: translateX(0);
    }

    .sidebar-overlay {
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        background-color: rgba(0,0,0,0.5);
        z-index: 1000;
        opacity: 0;
        visibility: hidden;
        transition: all 0.3s ease;
    }

    .sidebar-overlay.show {
        opacity: 1;
        visibility: visible;
    }

    .bottom-nav {
        display: flex;
    }

    .main-content {
        padding-bottom: var(--bottom-nav-height);
    }

    .top-header {
        padding: 0 1rem;
    }

    .content-body {
        padding: 1rem;
    }
}